You can put whatever you wish into your InfoBar if you eiher find or write the needed convertors and renderers.
As you can see icons are there to show that both Dolby and dual audio have been detected from either DVB or a Stream, it works on both.
And that is exactly what was the original question about, how to get info about number of channels. You have only Dolby icon and as Erik explained it probably will not be easy (if possible) to get such convertor/renderer for channel numbers.